Yes mine is like the picture MH81 posted. I was able to get another spare key for mine from John Deere, however I doubt that the Deere ignition switch the key fits in would be correct. In the John Deere world that key fits an old 510 tractor ( if I remember correctly)
For some odd reason, I have run into this several times. I've seen those ignition switches on several JD's and always wondered.